--- a/configure
+++ b/configure
@@ -19874,8 +19874,6 @@
        CFLAGS="-g $CFLAGS"
 else
        CPPFLAGS="-DNDEBUG $CPPFLAGS"
-       CFLAGS=$(echo "$CFLAGS" | sed 's/-O2//;s/-g//')
-       CFLAGS="-O3 -funroll-loops $CFLAGS"
 fi
 
